仅选择具有不同值组合的条目？

Question

我有一个表，links1，其列标题为CardID和AbilityID，如下所示：

CardID | AbilityID
1001   | 1
1001   | 2
1001   | 3

1002   | 2
1002   | 3
1002   | 4

1003   | 3
1003   | 4
1003   | 5

我想要的是能够返回具有两个特定AbilityID的所有CardID。

例如：

  

如果我选择1和2，则返回1001.
  如果我选择3和4，则返回1002和1003。

是否可以只使用一个表来执行此操作，还是需要创建相同的表并对其进行内部联接？

Answer 1

尝试自我加入：

SELECT t1.CardID 
FROM links1 AS t1 
JOIN links1 AS t2 
ON t1.CardID = t2.CardID 
WHERE t1.AbilityID = 1 AND t2.AbilityID = 2;

See this SQLFiddle

Answer 2

You can try nested query,in your case
SELECT cid FROM
    (
        SELECT cid,COUNT(cid) AS total FROM links WHERE aid = 1 OR aid = 2
        GROUP BY cid
    ) AS t1 WHERE total%2 = 0;